Tower or mast



H. COHEN TOWER OR MAST Feb. 13, 1945.

Filed March l0, 1943 2 Sheets-Shee`1'. 1

wrmasss H. .COHEN TOWER OR MAST Feb. 13, 1945.

Filed March 10, 1943 2 Sheets-Sheet 2 4INVENTOR B21740101 Cohen.

wnjNEssES Patented Feb. 13, 1945 'mwen onMAs'r p p `Harold' Cohen, Elizabeth,y Ni.' l Application March 1 0, 1943, Seriall No 478,690v .x

1' claim,` (ci. 18szei vrThis invention relates toa eld unit which may n be used as a tower or mastior various purposes,

and servesadvantageouslyfor supporting a radio antennaoraerial.

' -An object of the invention is the provision of a towerfor mast which Ina-y` be transported from place to place, and which may bey quicklyI and' easilyset' up for use. l i

`A further' object is the provision of a rn-ast of the indicated character which is serviceable to militaryl forces, such as the SignalY Corps and other mobile branches of the army, ,or'l`andforces which require quick and fcient installations,

and theremoval of equipment with dispatch when Y use; but which may be readily collapsed and-jt'aken apart in such manner that parts thereof. 'a'.ndfacvm cessoriesmay be compactlyf'crated for shipment, and so as torequire but comparatively little space when not in use.

Other objects and featuresof the invention as well as the combination and construction of parts will be apparent from the following description and from the accompanying drawings in which:

Figure 1 is a view in elevation of a field unit embodying the features of the invention.

Figure 2 is a detail section 'or portions of the mast on the line 2-2 of Figure 1. y

Figure 3 is a section of components of the mast together withmeans for guying the same, the

' section being taken on the line 3-3 of Figure 1.

Figure 4 is a section on the line 4-4 of Figure 3.

Figure 5 is an enlarged section of the mast f showing it collapsed, and also showing the anchoring base, coupler and boom detached, portions of the mast and boom being broken away.

Figure 6 is a section on the line yIS--S of Figure 'Ishowing'the boom attached to the coupler.

tra'ctable-and accordingly consists of a plurality of relatively movable sections associated with eachother. In the presen-t. instance 4each portion of the mast consists. of live sections which are design-ated'IB, I4`, If5, I6= ancliI'I- respectively. Obviously ,any other number of sections maybe used, either more or lessJ than five. The sections I3'-Il' consist of suitabley piecesof pipe and `areequal so far as length is concerned, although .f the section H ofthe lower hal-f may be somewhat longer thanthe others. Also the sections, sta-rting with the sectionl I4' are progressively smaller in cross-sectionalv size orV diameter than the section |13. The sections I3--I1f are arranged in telescopi-ng relation so that theyv may be extend'- ed' or retractedy or collapsed inv nested relation. Each -of the sections, except the section I'I has a ring |28 secured? thereto, as byI Welding, at one end on-fthe inside. lTo this ring I8 is likewise secured a ring I9 on theinsi'de, and the formeris approximately one-half the width of the latter to provide a stop shoulder.Y Each of the sections',l except the section I3,A has' a ring` 23 secured thereto-atene end on the outside which serves as a stop tio-cooperate with the stop I9 of' the contiguousl section inorder yto limitthe extendingmovement of the sections.

The portions lII and I2 'are joined end to end and this is accomplished by the use of ilanged Figure 7 is a section on the line 'I-l of Figure 6.

lation by any suitable means which may be readily'detached or released. In the present instance a simple and practical means consists of cross-bars 23 for each pair of sections which extend transversely through the sections and the rings I8 and 20, the same having slot shape holes 24 for that purpose. Each cross-bar 23 projects at opposite sides of the related mast section and has slot-shape holes therein to receive wedge-shape keys 25 respectively. The keys 25 lock the cross-bars 23 in place yand are apertured as at 2B for the purpose of accommodating guy lines 2'I for guying the mast. 1

In order to anchor the` lower end of the mast and also to enable the movement of the mast from la horizontal position to a vertical position and vice versa, there is provided a base 28 and a coupler 29 shown most clearly in Figures 5. 6`

and 7. The coupler 29 is a hollow box-like structure and has a hole in the top to receive the lower end of the section I1 of the lower mast portion, there being a socket 30 on the bottom of the coupler to receive the lower Vextremity of said section I1.

Flanged collars 3| are bolted, as at 32, to the top of the coupler at the hole therein. The mast section I1 extends through the collar 3| and is welded or otherwise secured thereto. A king-bolt 33 extends through the sides of the base 28, the section I1 and the coupler 29 to provide a pivotal connection of the mast with the base. The mast ID may therefore be disp-osed in a horizontal position as shown in Figure 5 or in a vertical position as shown in Figure 1.

In order to serve as a means for effecting the movement of the mast into and out ofthe vertical and horizontal positions by the application of leverage thereto, there is provided a boom or arm 34 which has one end thereof bolted as at 35 to the coupler 29. The arm 34 thus secured is disposed at an angle to the longitudinal axis of the mast. The arm 34 has an eye 36 on the outer end toreceive a power cable for raising and lowering the mast. The arm 34 may be detached.

In accordance with the invention the mast ID may be extended or retracted while in the horizontal position. In other` words, the sections I3-I1 may be extended and the cross-bars 23 and keys 25 employed to retain them extended. The guy lines 21 may be connected to certain of the keys. The guy lines 21 at three sides maybe anchored. A pulling force is then applied to the arm 34 to raise the extended mast to the vertical position. The remaining guy lines 21 may then be anchored to securely hold the mast uprightas shown in Figure 1. The anchors for the guy lines are designated 31. By uprooting the anchors 31 at the arm side of the mast it may be lowered to the horizontal position as will be. understood. In this position the keys 25 and cross-bars 23 may be removed and the sections of the mast collapsed in nested relation.

The upper mast portion I2 may be detached from the lower portion II b-y removing the bolts 22, and the arm 34 may also be detached by removing the bolts 35. The parts thus separated may be crated for shipment and so require small space when not in use. The coupler has an opening 38 in the bottom. The anchors 31 may be inserted in the mast sections I1 of the detached portions II and I2 prior to crating the parts.

In Figure 8 there is shown a modification of the means for associating a pair of the mast sections and for attaching the guy lines. Instead of the rings I8, I9 and 20 shown in Figure 3 use is made of ytubular members 39 and` 40 having integral end anges 4I and 42 respectively. The members 39 and 4I] are secured to the sections in any suitable manner, as by welding. The member 39 is arranged on the inside of one section and the member 49 on the outside of the other section.

The ange 42 of the member 40 serves as a stop to limit the extending movement of the sections. In other respects the provision and arrangement shown in Figure 8 are similar to that in Figure 3. In cases where greater strengthand rigidity is desired or required the construction shown in Figure 8 will be adopted.

On reference to Figure 3 it will be seen that rings I8 and 23 can be welded to the section I5 and the ring I9 welded to the section I6. The bars 23 may extend through the rings I8 and I9 and the mast sections, there being holes provided for that purpose. The keys 25 being emplcyed as shown impinging against the bars 23 and the mast section. In this manner the mast sections may be assembled quickly Without the use of bolts and the like.

Units embodying the features of the invention serve adequately for supporting an antenna or aerial, and it is to be understood the invention is not limited to such use.

I claim: v

In an extensible and retractable mast consist-v ing of telescopic sections, bars extending through contiguous sections to hold them from moving endwise with respect to each other, and wedgeshape keys extending through said bars and bearing on said sections to hold the bars in place, said keys having provision whereby guy lines or the like may be secured thereto for the mast.

HAROLD COHEN. 

